Updated: 2022/Sep/29

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LOCK(1)                     General Commands Manual                    LOCK(1)

NAME
     lock - reserve a terminal

SYNOPSIS
     lock [-np] [-t timeout]

DESCRIPTION
     lock requests a password from the user, reads it again for verification
     and then will normally not relinquish the terminal until the password is
     repeated.  There are two other conditions under which it will terminate:
     it will timeout after some interval of time and it may be killed by
     someone with the appropriate permission.

     Options:

     -n          No timeout is used.  The terminal will be locked indefinitely
                 or until current challenge is met.

     -p          A password is not requested, instead the user's current login
                 password is used.  If the user has an S/Key key, they may
                 also use it to unlock the terminal.  To do this the user
                 should enter "s/key" at the unlock "Key:" prompt.  The user
                 will then be issued an S/Key challenge to which they may
                 respond with a six-word S/Key one-time password.

     -t timeout  The time limit (default 15 minutes) is changed to timeout
                 minutes.

SEE ALSO
     skey(1)

HISTORY
     The lock command appeared in 3.0BSD.

NetBSD 10.99                     June 6, 1993                     NetBSD 10.99